package io.renren.util;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpClientUtil {
	/**
	 * post请求传输map数据
	 * 
	 * @param url
	 * @param map
	 * @param encoding
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public static String sendPostDataByMap(String url, Map<String, String> map, String encoding)
			throws ClientProtocolException, IOException {
		String result = "";

		// 创建httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		// 创建post方式请求对象
		HttpPost httpPost = new HttpPost(url);

		// 装填参数
		List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
		if (map != null) {
			for (Entry<String, String> entry : map.entrySet()) {
				nameValuePairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
			}
		}

		// 设置参数到请求对象中
		httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, encoding));

		// 设置header信息
		// 指定报文头【Content-type】、【User-Agent】
		httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
		httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

		// 执行请求操作，并拿到结果（同步阻塞）
		CloseableHttpResponse response = httpClient.execute(httpPost);
		// 获取结果实体
		// 判断网络连接状态码是否正常(0--200都数正常)
		if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
			result = EntityUtils.toString(response.getEntity(), "utf-8");
		}
		// 释放链接
		response.close();

		return result;
	}

	/**
	 * post请求传输json数据
	 * 
	 * @param url
	 * @param json
	 * @param encoding
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public static String sendPostDataByJson(String url, String json, String encoding)
			throws ClientProtocolException, IOException {
		String result = "";

		// 创建httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建post方式请求对象
		HttpPost httpPost = new HttpPost(url);

		// 设置参数到请求对象中
		StringEntity stringEntity = new StringEntity(json, ContentType.APPLICATION_JSON);
		stringEntity.setContentEncoding("utf-8");
		httpPost.setEntity(stringEntity);

		// 执行请求操作，并拿到结果（同步阻塞）
		CloseableHttpResponse response = httpClient.execute(httpPost);

		// 获取结果实体
		// 判断网络连接状态码是否正常(0--200都数正常)
		if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
			result = EntityUtils.toString(response.getEntity(), "utf-8");
		}
		// 释放链接
		response.close();

		return result;
	}

	/**
	 * get请求传输数据
	 * 
	 * @param url
	 * @param encoding
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public String sendGetData(String url, String encoding) throws ClientProtocolException, IOException {
		String result = "";

		// 创建httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();

		// 创建get方式请求对象
		HttpGet httpGet = new HttpGet(url);
		httpGet.addHeader("Content-type", "application/json");
		// 通过请求对象获取响应对象
		CloseableHttpResponse response = httpClient.execute(httpGet);

		// 获取结果实体
		// 判断网络连接状态码是否正常(0--200都数正常)
		if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
			result = EntityUtils.toString(response.getEntity(), "utf-8");
		}
		// 释放链接
		response.close();

		return result;
	}

	/**
	 * post请求（用于请求json格式的参数）
	 * 
	 * @param url
	 * @param params
	 * @return
	 */
	public static String doPost(String url, String params, Map<String, String> header) throws Exception {
		CloseableHttpClient httpclient = HttpClients.createDefault();
		System.out.println(url);
		HttpPost httpPost = new HttpPost(url);// 创建httpPost
		for (String in : header.keySet()) {
			String str = header.get(in); 
			httpPost.setHeader(in,str);
			System.out.println(in+"=="+str);
		}
//		httpPost.setHeader("Accept", "application/json");
		httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");
		String charSet = "UTF-8";
		StringEntity entity = new StringEntity(params, charSet);
		httpPost.setEntity(entity);
		CloseableHttpResponse response = null;
		try {

			response = httpclient.execute(httpPost);
			StatusLine status = response.getStatusLine();
			int state = status.getStatusCode();
			System.out.println(HttpStatus.SC_OK);
			System.out.println(state);
			if (state == HttpStatus.SC_OK) {
				HttpEntity responseEntity = response.getEntity();
				String jsonString = EntityUtils.toString(responseEntity);
				return jsonString;
			} else {
			}
		}catch(Exception e){
			e.printStackTrace();
		} 
		
		finally {
			if (response != null) {
				try {
					response.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			try {
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return null;
	}

}
